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How is stage III chronic obstructive pulmonary disease (COPD) diagnosed?

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A spirometry test, just like the ones you had when you were first diagnosed with COPD, will tell you if your condition is changing. If it shows your forced expiratory volume (FEV1) is between 30% and 49%, you're in stage III.

You may get other tests to help guide your treatment. For example, checking the oxygen level in your blood might show that oxygen therapy could help you.

From: Stage III (Severe Stage) COPD WebMD Medical Reference

SOURCES:

Global Initiative for Chronic Obstructive Lung Disease: "What You Can Do About a Lung Disease Called COPD."

Oklahoma Department of Human Services: "Stages of COPD and Spirometric Classifications."

NIH, National Heart, Lung, and Blood Institute: "COPD."

Medscape: "Chronic Obstructive Pulmonary Disease (COPD)."

Johns Hopkins Medicine: "Signs of Respiratory Distress."

American Thoracic Society: "COPD Today," "Exacerbation of COPD."

YourLungHealth.org: "Stages of COPD."

Cleveland Clinic: "Nutritional Guidelines for People with COPD."

COPD Foundation: "Exercise for Someone with COPD."

American Lung Association: "Supplemental Oxygen."

Reviewed by Jennifer Robinson on February 19, 2018

SOURCES:

Global Initiative for Chronic Obstructive Lung Disease: "What You Can Do About a Lung Disease Called COPD."

Oklahoma Department of Human Services: "Stages of COPD and Spirometric Classifications."

NIH, National Heart, Lung, and Blood Institute: "COPD."

Medscape: "Chronic Obstructive Pulmonary Disease (COPD)."

Johns Hopkins Medicine: "Signs of Respiratory Distress."

American Thoracic Society: "COPD Today," "Exacerbation of COPD."

YourLungHealth.org: "Stages of COPD."

Cleveland Clinic: "Nutritional Guidelines for People with COPD."

COPD Foundation: "Exercise for Someone with COPD."

American Lung Association: "Supplemental Oxygen."

Reviewed by Jennifer Robinson on February 19, 2018

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How is stage III chronic obstructive pulmonary disease (COPD) treated?

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